Source : Webster's Revised Unabridged Dictionary (1913)

Threap \Threap\ (thr[=e]p), v. t. [imp. & p. p. {Threaped}; p.
   pr. & vb. n. {Threaping}.] [AS. [thorn]re['a]pian to
   reprove.] [Written also {threpe}, and {threip}.]
   1. To call; to name. [Obs.]

   2. To maintain obstinately against denial or contradiction;
      also, to contend or argue against (another) with
      obstinacy; to chide; as, he threaped me down that it was
      so. [Prov. Eng. & Scot.] --Burns.

   3. To beat, or thrash. [Prov. Eng.] --Halliwell.

   4. To cozen, or cheat. [Prov. Eng.] --Halliwell.